Re: upgrading cisco 1130 autonomous AP to lightweight
You talk about different things and then mix all of them...
H-REAP is a simple mode of an LWAPP AP.
The AP lwapp software is upgraded/downgraded automatically when you upgrade/downgrade the WLC software.
They do not need to be in the same subnet they only need to be reachable, and the AP needs to be joined to the WLC.
Whenever an AP joins to a WLC, the first thing it does is to see if it is running the corresponding version of software. If not, the AP will automatically download the corresponding image fro mthe WLC and reload with the correct version.
So there is nothing to do on the AP orhter than make sure it joins the WLC. Then they do the rest automatically.
Now, you say the AP is in rommon mode...this means there is no IOS at all installed, so at least you need a base image.
To get a base image into the AP you can follow the procedure: